Author Affiliations
Abstract
1 School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116, China
2 Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130022, China
This paper proposes an experimental approach for monitoring and inspection of the formation accuracy in ultra-precision grinding (UPG) with respect to the chatter vibration. Two factors related to the grinding progress, the grinding speed of grinding wheel and spindle, and the oil pressure of the hydrostatic bearing are taken into account to determining the accuracy. In the meantime, a mathematical model of the radius deviation caused by the micro vibration is also established and applied in the experiments. The results show that the accuracy is sensitive to the vibration and the forming accuracy is much improved with proper processing parameters. It is found that the accuracy of aspheric surface can be less than 4.m when the grinding speed is 1400r/min and the wheel speed is 100r/min with the oil pressure being 1.1 MPa.
Optical aspheric surface micro-vibrations ultra-precision grinding formation accuracy grinding speed Photonic Sensors
2018, 8(2): 97
陕西师范大学 物理学与信息技术学院, 西安 710062
根据表面波声光效应的原理, 实验上建立了固体表面微振动的激光衍射测量系统.当激光斜入射到微振动引起的液体表面波上, 观察到了清晰、反衬度非常高的衍射图样.利用MATLAB软件对拍摄的衍射图样进行扫描, 得到了衍射光斑的光强分布图, 并根据衍射图样宽度与表面波振幅的解析关系式, 求出了液体表面波的振幅, 其大小在微米量级.改变样品池中液体的深度, 测得不同深度下液体表面波的振幅, 给出了表面波振幅与液体深度之间的解析关系, 并发现了液体对微振动的放大效应.利用液体对微振动的放大效应, 求出了固体表面微振动的振幅, 实现了固体表面微振动的探测.
微振动 振动放大 衍射 液体深度 Micro vibrations Vibration large Diffraction Liquid depth
